Ventilator.



, W1 TNESSES //VVf/V70/?, l 1 By W i Q (L m No. 873,125. PATENTED DEC.10, 1907.

W. HAMMANN.

VEN TILATOR.

APPLICATION FILED APR.20.1907.

' ments in ventilators of that an improved ventilator of this characterwhich is so constructed that the ventilators in the claims at the end ofthe specification.

I or

' -which the ventilator is to be applied, this support the ventilator ata sufficient height -above the roof to permit a free circulation of andspaced at suitable distances around the Fig. 3,these braces being comosed of bar UNITED STATES Parana: OFFICE- WILLIAM HAMMANN, OF MILWAUKEE,WISCONSIN.

VENTILATOR.

No. 873,125. Specification of Letters Patent. Patented Dec. 10, 1907.

Application filed April 20, 1907- ,Serial No. 369,314-

To all whom it may concern:

Be it known that I, WILLIAM HAMMANN, a citizen of the United States,residing at Milwaukee, in the county of Milwaukee and State ofWisconsin, have invented a new and useful Ventilator, of which thefollowing is a specification.

The present invention relates to improvetype adapted to be arranged onthe roof of halls, theaters, and other buildings, for permittingheate'dand foul air to escape and to insure a supply of fresh air, and it hasfor its object to provide may be made of very light sheet metal that arecapable of retaining their shape, and, furthermore, it has for itsobject tov provide an improved damper or valve for controlling thepassage of air through the ventilator.

To these and other ends, the invention consists in certain improvementsand combinations and arrangements of parts, all as will be hereinaftermore fully described, the novel features being pointed out particularlyIn the accompan ing drawings: Figure 1 is a central vertical section ofa ventilator constructed in accordance with my present invention. Fig.-2 represents a horizontal section on the line 2-2 of Fig. 1. Fig. 3 isa perspective view of a brace constructed from sheet metal.

Corresponding parts in the several figures are indicated throughout bysimilar characters of reference.

.The ventilator shown in the present embodiment of the inventioncomprises a tube pipe 1 of suitable diameter and adapted to be mountedon the roof of the building to tube or pipe being of a length sufficientto air. To the upper end of the tube or pipe circumference are a seriesof rigid braces or reinforcements, such as shown 1n detail in iron orother suitable materia of suitable thickness and width to afford themthe desired rigidity, these braces each embodying an inner attachingportion 3 which extends vertically and is riveted or otherwise securedto the upper end of the pipe, and opposite the attaching portion is avertical pOIltiOn 4 to which is riveted, or otherwise secured, anannular wind shield 5 that is composed oftin or sheet iron of relativelylight weight, the wind shield thus provided having vertically extendingsides that are concentric with the axis of the central pipe 1. of theattaching portion 3 of each brace is formed a lower storm shield support6.to

which is riveted, orotherwise secured, a-

conical storm shield 7 having itsv sides extending obliquely relativelyto the sidesof the central supporting plate,-an intermediate connectingportion 8 of each brace extending between the outer edges of the wind.or storm shields 5 and 7, respectively, to retain At the rear end theseparts firmly in their proper relative positions.

Extending outwardly from the upperpor i v tion of the attaching portion3 of each brace is a connecting portion 9, the outer end of the latterbeing wardly and inwardly to form an upper storm shield support 10 towhich shield 11 is riveted or otherwise secured, the latter being solocated that its spaced below the roof or top 12. The latter is conicalin shape andis composed of relatively light sheet iron or -tin, and itis supported in position by means of the connecting portions 13 and 14,the connectin por tion 13 extending in a direction inward y and upwardlyfrom the upper end of the wind shield, and the connecting portion 14;extending upwardly from the upper edge of the upper storm shie d, theperip eral edge ofithe roof or top preferably. upper or smaller diameterof the upper storm shield to revent the entrance of rain to the centralraft or, supporting pipe. These bracesv may be formed either integral orof a,

single piece of metal of endless form, although it is preferable to formthem of a single piece for the reason that-it facilitates assembling ofthe ventilator. If so desired, the braces for securing the wind andstorm shieldsand the top to the supporting tube may be made extended ina direction upz the conical storm upper edge is projecting beyond the;

up of sheet metal, a brace so constructed being shown in Fig. 3 of thedrawings, and comprising a plate or body portion 30 adapted to extendradially of the ventilator when in position, the peripheral ed es of theplate bent at right angles to its s aces to form a set of attachingportions or flanges, the flange 31 serving as an attaching portion forthe wind shield 5, the flange 32- for the attachment of the top, theflanges 33 and. 34'

serving as attachments for the upper and lower storm shields, and theflanges 35 providing means for securing the brace to the supportingpipe, the intermediate flanges 36, 37 and 38 serving to stiffen thebrace at points intermediate those parts attached to the elements of theventilator. structed as above described may be made very cheaply as itcan be punched and stamped into form from sheet metal by the use ofdies, requiring very little metal.

Surmounting the top or roof. is a cap 15 and beneath the cap and securedto the center of the roof or top is a guiding tube 16 which extendsaxially of the supporting or draft pipe and is held centered relativelythereto by means of a series of braces or stays 17 which are composed ofbar iron having their outer ends secured to the inner side of thesupporting pipe and are attached at their inner ends to the guidingtube, a suitable number of stays being spaced radially between thecentral guiding tube and the supporting pipe. Mounted to operate axiallyof the guiding tube is a damper or valve 18 which is composed, in thepresentinstance, of upper and lower conical members 19 and 20,respectively, that are made of sheet metal of a suitable strength, themembers being placed together with their concavities facing one anotherand are connected at their centers by means of a sleeve 21 which has asliding fit on the guiding tube of the damper so that the damper orvalve will operate vertically thereon. he outer edges of the conicalmembers are secured in any suitable way, such as by riveting or folding,and the valve thus provided is adapted to cooperate with the upper endof the draft or supporting pipe to control the flow of air therethrough,and in order to insure a close fitting of the damper, the upper edge ofthe draft pipe is provided with a felt seat 22 on which the damper restswhen in closed position, this felt seat in the present instance beingformed of a strip having its longitudinal edges folded on the inner andouter sides of the draft pipe.

In order to facilitate the operation of the damper it is counterbalancedby a weight 23 which is guided to operate vertically within the guidingtube, a cord or chain 24 having an intermediate portion passing throughan eye or pulley 25 on the weight, and having its ends attached to thedamper at points on opposite sides of the guiding tube, and in order toeffect an automatic closing of the damper in case of fire, fusible l ks26 and 27 are interposed between the en s of the connecting cord and thedamper to permit closing of the latter when the temperature Within theventilator exceeds a given limit.

The device may be so constructed that the counterweight is heavier thanthe damper,

A brace con weight causing a closing movement of the damper and adownward movement of the counterweight causing an opening movement ofthe damper. In order to minimize friction, theen'd' of the balancingcords pass over relatively fixed pulleys 29 and 30 mounted within thecap 15, the latter serving to close the guiding tube and protect thepulleys and other operating parts.

,A ventilator embodying my present invention may be constructed of vethin or light sheet metal for the reason that the weight and strains towhich the parts are subjected is sustained by the reinforcing braces,the sheet metal serving mainly for the purposes of breaking the directcourse of the wind striking the ventilator from the outside and torevent entrance of rain, and the like, and tl fe improved form of dampernot only centralizes the construction of the device, but it improves thecirculation of air, for the reason that when it is in open position, itfills the s ace formed in the center of-the top cone an the lowerconical surface of the damper serves as an angular deflector fordirecting the air passing outwardly through the spaces at the top andbottom of the upper storm shield, so that very little suction isrequired to effect the discharge of the air.

What is claimed is 1. In a ventilator, the combination with a draftpipe, and a roof supported above the upper open end thereof, of a tubecentered axially of the draft pipe, a valve arranged to cooperate withthe draft pipe and having a sleeve guided to operate longitudinally ofthe said tube, a counterweight mounted to operate vertically within thesaid tube, and operative connections between the counterweight and thevalve whereby the former balances the latter.

2. In a ventilator, the combination with a supporting or draft pipe, anda top spaced above the upper end thereof and forming an exit for theairascending the pipe, of a guiding tube arranged axially of the pipe, adamper guided to operate on said tube and to co operate with the upperend of the draft pipe to control the flow of air there throug acounterweight guided to operate longitudinally within the tube, andoperative connections between the counterweight and damp 3. In aventilator, the combination with a supporting or draft pipe, and a topmounted above the upper end thereof and forming an in which case a cordcan be attached to the x jxit for air ascending the pipe, of a guidingtube arranged axially of the pipe, a damper guided to operatelongitudinally of the tube and adapted to cooperate with the upper endof the pipe, a counterweight mounted to operate vertically within theguiding tube, a

flexible cord having its ends attached tothe damper, and loosely engaing the Weight at an intermediate point an pulleys mounted in the topfor guiding the cord.

4. In a ventilator, the combination with a supporting or draft pipe, andatop spaced above the upper end thereof, of a guiding device arrangedbetween the top and the supporting pipe, a damper mounted to operatevertically of said guiding device and adapted to cooperate with theupper end of the pipe to control the passage of air therethrough, acounterweight for normally supporting the weight of the damper, flexibleconnections attached to the counterweight and extending to the undersideof the damper,- and fusible links secured to the underside of the damperand attached to the flexible connections for-relieving the supportingaction of the weight.

5. In a ventilator, the combination with a supporting or draft pipe, anda conical top spaced above the upper end thereof, of a guiding tubeconnected at its upper end to the top and having stays operatively connecting its lower end to the pipe, a damper mounted to operatelongitudinally of the guiding tube and adapted to cooperate with theupper end of the pipe, embodying a pair of conical sheet metal membersplaced together with their concavities facing one another, and a centralsleeve connecting the conical members, a counterweight mounted tooperate longitudinally of the guiding tube, flexible connectionsattached to the counterweight, an operating device connected to thecounterweight and extending through the lower end of the guidin tube,and fusible links arranged at the unc ierside of the damper andconnecting the latter to the flexible connections. r

In testimony that I claim the foregoing as my own, I have hereto aflixedmy signature in the presence of two witnesses.

WILLIAM HAMMANN. Witnesses:

CHAS. FRIEDRICH, FRED A. TEALL.

